CN104328789B - The overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete - Google Patents

The overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete Download PDF

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Publication number
CN104328789B
CN104328789B CN201410605549.3A CN201410605549A CN104328789B CN 104328789 B CN104328789 B CN 104328789B CN 201410605549 A CN201410605549 A CN 201410605549A CN 104328789 B CN104328789 B CN 104328789B
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China
Prior art keywords
support replacement
support
construction
layers
replacement
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CN201410605549.3A
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Chinese (zh)
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CN104328789A (en
Inventor
刘杰
刘乐园
张欣
杨虹轶
李胜
刘子旭
王起阳
刘淳
高崙
李锦春
邓应平
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天津三建建筑工程有限公司
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Publication of CN104328789A publication Critical patent/CN104328789A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them

Abstract

The invention discloses the overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete, its construction sequence is setting and the overhanging type support replacement working procedure of the structural element of support replacement, and the structural element of the support replacement of described setting is support replacement beam and the stiffener of encorbelmenting; Overhanging type support replacement working procedure, design 3 procedures, i.e. the sequential production of the construction of sole plate and outer wall of basement and support replacement beam of encorbelmenting, stiffener and negative two layers of top board, Vierendeel girder, after support replacement band reaches design strength, negative two layers of external wall waterproof layer and topping complete, possess and tear stay part open; After steel concrete horizontal inner supporting structure demolition blasting by the back-filling in layers of available concrete disintegrating slag substep in dead slot between soldier pile and outer wall of basement.Beneficial effect of the present invention: utilize building basement structure to carry out Stress transmit; Increase support replacement rigidity; Improve the stability of foundation pit side-wall; Save the construction period; Blowing up concrete disintegrating slag as water jacket replacing method, can save outer freight charges and cost of materials.

Description

The overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete
Technical field
The present invention relates to a kind of support replacement construction method of deep-foundation pit engineering inner support, particularly relate to the overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete, belong to architectural engineering pit field of engineering technology.
Background technology
Being located in No. one, road, Tai'an, Tianjin institute's engineering of urban architecture compact district, is high-end residential engineering, overall floorage 72000m 2, 2 layers, underground, 9 layers is on the ground frame-shear-wall structure.Absolute altitude at the bottom of foundation ditch is-10.800m, and the excavation of foundation pit degree of depth is 10.650m.Whole deep foundation ditch form is a right-angled trapezium, 142.9m long from south to north, and the wide 79.65m of thing, foundation ditch area is about 11000 ㎡.
Pattern foundation pit supporting structure, another name foundation ditch protects, and is the safety for ensureing Underground Construction and foundation ditch surrounding enviroment, and what adopt foundation pit side-wall and surrounding enviroment props up gear, reinforcing and safeguard measure.This project because of its geographical position special, building is close to Haihe River, because the stability requirement for foundation ditch is high, therefore engineering adopts the pattern foundation pit supporting structure form that platoon castinplace pile, three axes agitating pile water-stop curtain and the horizontal inner support of steel concrete combine, soldier pile strength grade of concrete is C30, and support system concrete strength is C30.Wherein the horizontal inner support of steel concrete is a kind of provisional support system, plays a transition role, and ensures the stable of foundation ditch.When underground engineering construction to a certain extent time, need by provisional steel concrete horizontal bracing demolition.The previous work of bracing demolition carries out support replacement to the horizontal inner support of steel concrete, the stress that support replacement produces will be transferred in other structure, its essence is the safe and orderly adjustment of stress, transfer and reallocation, thus after ensureing provisional bracing demolition, whole engineering construction can continue safety and successfully carry out.
In order to accelerate the construction period; do not affect the sequential production of underground structure; ensure the normal construction of external wall waterproof layer and topping; adopting the blasting technique of millisecond detonating, under ensure that onepull reaches crushing effect prerequisite, make each procedure in same foundation ditch interrelated; duration is controlled; adopt which kind of mode to carry out support replacement to the horizontal inner support of steel concrete, becoming the problem that building industry engineers and technicians extremely pay close attention to, is also construction engineering technician problem demanding prompt solution.
Summary of the invention
Object of the present invention; it is the overhanging type support replacement construction method proposing the horizontal inner support of a kind of steel concrete; this overhanging type support replacement construction method is the blasting technique of follow-up employing millisecond detonating; remove the horizontal inner supporting structure of steel concrete; provide good, necessary condition; thus ensure the normal construction of external wall waterproof layer and topping, reach and make each procedure in same foundation ditch interrelated, the object that the duration is controlled.
For achieving the above object, the technical scheme adopted is in the present invention:
An overhanging type support replacement construction method for the horizontal inner support of steel concrete, is characterized in that: the operating procedure of its construction method, comprise 1, the setting and 2 of the structural element of support replacement, overhanging type support replacement working procedure, specific as follows:
1, the setting of the structural element of support replacement
The structural element of support replacement comprises 1-1 and to encorbelment support replacement beam and 1-2 stiffener, described in encorbelment the setting of support replacement beam (3) and stiffener, as follows respectively:
1-1 encorbelments the setting of support replacement beam
Be positioned at negative two layers of top board and Vierendeel girder place, utilize negative two layers of beam slab system, arrange one at Vierendeel girder place and to encorbelment support replacement beam, support replacement of encorbelmenting beam is that independent formwork support body directly extends to soldier pile, as support system off-load;
The setting of 1-2 stiffener
Stiffener is arranged on the both sides at corners of building place, the important sensitive part area to the both sides of supportting and cloth pump position;
Described stiffener and support replacement beam of encorbelmenting, common composition support replacement band;
2, overhanging type support replacement working procedure
Overhanging type support replacement working procedure, designs 3 procedures, is the construction of 2-1 sole plate, and the construction of 2-2 outer wall of basement and 2-3 encorbelment the sequential production of support replacement beam, stiffener and negative two layers of top board, Vierendeel girder, and the operating procedure of each procedure is as follows:
The construction of 2-1 sole plate
When constructing sole plate, the concreting area of sole plate need be strengthened, space between sole plate and soldier pile is all filled with basis same concrete, form base plate reinforcing band, to play support top effect;
The construction of 2-2 outer wall of basement
Adopt conventional construction method, carry out the colligation of exterior wall reinforcing bar, the installation of template and concretely to build;
2-3 encorbelments the sequential production of support replacement beam, stiffener and negative two layers of top board, Vierendeel girder
Support replacement of encorbelmenting beam, stiffener and negative two layers of top board, Vierendeel girder are built shaping simultaneously, tight soldier pile must be pushed up, when encorbelment support replacement beam and soldier pile junction are adjacent two soldier pile gap, the single-layer bidirectional steel mesh reinforcement that bar diameter is 12mm is set, make to encorbelment support replacement beam and soldier pile top tight;
2-4 external wall waterproof layer and topping are constructed
Construction method routinely, construction outer wall waterproofing course and topping;
2-5 tears stay part open for the horizontal inner supporting structure demolition blasting of steel concrete provides
After support replacement band reaches design strength, negative two layers of external wall waterproof layer and topping complete, possess and tear stay part open;
The negative two layers of water jacket backfill of 2-6 basement
After steel concrete horizontal inner supporting structure demolition blasting by the back-filling in layers of available concrete disintegrating slag substep in dead slot between soldier pile and outer wall of basement.
Described support replacement beam of encorbelmenting, its Design of length is between 600mm ~ 1500mm, and its cross section is 300 × 500mm/300mm, and arrangement of reinforcement is with former negative two layers of Vierendeel girder arrangement of reinforcement.
Described stiffener, thickness of slab 200mm, tectonic level indented bars diameter 12mm, spacing 150mm.
The concreting area of described increasing sole plate, based on void area between base plate and soldier pile.
Beneficial effect
The present invention has following beneficial effect:
1, building basement structure carries out Stress transmit.
2, increase support replacement rigidity, improve the stability of foundation pit side-wall.
3, the support replacement beam that carries out encorbelmenting, stiffener and negative two layers push up plate-beam construction while can insert waterproofing course and the topping of exterior wall, saving construction period.
4, before completing the horizontal inner supporting structure of steel concrete, external wall waterproof layer and topping complete, and blowing up concrete disintegrating slag as water jacket replacing method, can save outer freight charges and cost of materials.
Accompanying drawing explanation
Fig. 1 is that encorbelment support replacement beam and stiffener of the present invention arranges floor map;
Fig. 2 is that the present invention's support replacement beam of encorbelmenting arranges generalized section.
In Fig. 1: 1-bears two layers of top board; 2-Vierendeel girder; 3-encorbelments support replacement beam; 4-soldier pile; 5-stiffener; 10-steel mesh reinforcement.
In Fig. 2: 1-bears two layers of top board; 2-Vierendeel girder; 3-encorbelments support replacement beam; 4-soldier pile; 6-sole plate; 7-base plate reinforcing band; 8-outer wall of basement; The horizontal inner supporting structure of 9-steel concrete.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with accompanying drawing and most preferred embodiment, the present invention is described in further detail.
Embodiment
Refer to Fig. 1 and Fig. 2, the overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete, the operating procedure of its construction method, comprise 1, the setting and 2 of the structural element of support replacement, overhanging type support replacement working procedure, specific as follows:
1, the setting of the structural element of support replacement
The structural element of support replacement comprises 1-1 and to encorbelment support replacement beam 3 and 1-2 stiffener 5, described in encorbelment the setting of support replacement beam 3 and stiffener 5, as follows respectively:
1-1 encorbelments the setting of support replacement beam 3
Be positioned at negative two layers of top board 1 and Vierendeel girder 2 place, utilize negative two layers of beam slab system, arrange one at Vierendeel girder 2 place and to encorbelment support replacement beam 3, support replacement of encorbelmenting beam 3 directly extends to soldier pile 4 for independent formwork support body, as support system off-load;
The setting of 1-2 stiffener 5
Stiffener 5 is arranged on the both sides at corners of building place, the important sensitive part area to the both sides of supportting and cloth pump position;
Described stiffener 5 and support replacement beam 3 of encorbelmenting, common composition support replacement band;
2, overhanging type support replacement working procedure
Overhanging type support replacement working procedure, designs 3 procedures, is the construction of 2-1 sole plate 6, and the construction of 2-2 outer wall of basement 8 and 2-3 encorbelment the sequential production of support replacement beam 3, stiffener 5 and negative two layers of top board 1, Vierendeel girder 2, and the operating procedure of each procedure is as follows:
The construction of 2-1 sole plate 6
When constructing sole plate 6, the concreting area of sole plate 6 need be strengthened, the same concrete with basis is all filled in space between sole plate 6 and soldier pile 4, form base plate reinforcing band 7, to play support top effect;
The construction of 2-2 outer wall of basement 8
Adopt conventional construction method, carry out the colligation of exterior wall reinforcing bar, the installation of template and concretely to build;
2-3 encorbelments the sequential production of support replacement beam 3, stiffener 5 and negative two layers of top board 1, Vierendeel girder 2
Support replacement of encorbelmenting beam 3, stiffener 5 are built shaping with negative two layers of top board 1, Vierendeel girder 2 simultaneously, tight soldier pile 4 must be pushed up, when support replacement beam 3 of encorbelmenting is adjacent two soldier pile 4 gap with soldier pile 4 junction, arrange the single-layer bidirectional steel mesh reinforcement 10 that bar diameter is 12mm, the support replacement beam 3 that makes to encorbelment pushes up sternly with soldier pile 4;
2-4 external wall waterproof layer and topping are constructed
Construction method routinely, construction outer wall waterproofing course and topping;
2-5 tears stay part open for steel concrete horizontal inner supporting structure 9 demolition blasting provides
After support replacement band reaches design strength, negative two layers of external wall waterproof layer and topping complete, possess and tear stay part open;
The negative two layers of water jacket backfill of 2-6 basement
After steel concrete horizontal inner supporting structure 9 demolition blasting by the back-filling in layers of available concrete disintegrating slag substep in dead slot between soldier pile 4 and outer wall of basement 8.
Described support replacement beam 3 of encorbelmenting, its Design of length is between 600mm ~ 1500mm, and the present embodiment design 1000mm, its cross section is 300 × 500mm/300mm, and arrangement of reinforcement is with former negative two layers of Vierendeel girder 2 arrangement of reinforcement.
Described stiffener 5, thickness of slab 200mm, tectonic level indented bars diameter 12mm, spacing 150mm.
The concreting area of described increasing sole plate 6, based on void area between base plate 6 and soldier pile 4.
Above-mentioned construction method is adopted to carry out support replacement to the horizontal inner support of steel concrete, the stress that support replacement produces will be transferred in other structure, the safe and orderly adjustment of stress, transfer and reallocation, thus after ensureing provisional bracing demolition, whole engineering construction can continue safety and successfully carry out.
The above is only the preferred embodiment of the present invention; it should be pointed out that the professional for the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. an overhanging type support replacement construction method for the horizontal inner support of steel concrete, is characterized in that: the operating procedure of its construction method, comprise 1, the setting and 2 of the structural element of support replacement, overhanging type support replacement working procedure, specific as follows:
1, the setting of the structural element of support replacement
The structural element of support replacement comprises 1-1 and to encorbelment support replacement beam (3) and 1-2 stiffener (5), and it arranges as follows respectively:
1-1 encorbelments the setting of support replacement beam (3)
Be positioned at negative two layers of top board (1) and Vierendeel girder (2) place, utilize negative two layers of beam slab system, arrange one to encorbelment support replacement beam (3) at Vierendeel girder (2) place, support replacement of encorbelmenting beam (3) directly extends to soldier pile (4), as support system off-load for independent formwork support body;
The setting of 1-2 stiffener (5)
Stiffener (5) is arranged on the both sides at corners of building place, the important sensitive part area to the both sides of supportting and cloth pump position;
Described stiffener (5) and support replacement beam (3) of encorbelmenting, common composition support replacement band;
2, overhanging type support replacement working procedure
Overhanging type support replacement working procedure, design 3 procedures, for the construction of 2-1 sole plate (6), the construction of 2-2 outer wall of basement (8) and 2-3 encorbelment the sequential production of support replacement beam (3), stiffener (5) and negative two layers of top board (1), Vierendeel girder (2), and the operating procedure of each procedure is as follows:
The construction of 2-1 sole plate (6)
When constructing sole plate (6), the concreting area of sole plate (6) need be strengthened, the same concrete with basis is all filled in space between sole plate (6) and soldier pile (4), form base plate reinforcing band (7), to play support top effect;
The construction of 2-2 outer wall of basement (8)
Adopt conventional construction method, carry out the colligation of exterior wall reinforcing bar, the installation of template and concretely to build;
2-3 encorbelments the sequential production of support replacement beam (3), stiffener (5) and negative two layers of top board (1), Vierendeel girder (2)
Support replacement of encorbelmenting beam (3), stiffener (5) are built shaping with negative two layers of top board (1), Vierendeel girder (2) simultaneously, tight soldier pile (4) must be pushed up, when support replacement beam (3) of encorbelmenting is adjacent two soldier piles (4) gap with soldier pile (4) junction, arrange the single-layer bidirectional steel mesh reinforcement (10) that bar diameter is 12mm, the support replacement beam (3) that makes to encorbelment pushes up sternly with soldier pile (4);
2-4 external wall waterproof layer and topping are constructed
Construction method routinely, construction outer wall waterproofing course and topping;
2-5 is that the horizontal inner supporting structure of steel concrete (9) demolition blasting provides and tears stay part open
After support replacement band reaches design strength, negative two layers of external wall waterproof layer and topping complete, possess and tear stay part open;
The negative two layers of water jacket backfill of 2-6 basement
After the horizontal inner supporting structure of steel concrete (9) demolition blasting by the back-filling in layers of available concrete disintegrating slag substep in dead slot between soldier pile (4) and outer wall of basement (8).
2. the overhanging type support replacement construction method of the horizontal inner support of steel concrete according to claim 1, it is characterized in that: described in encorbelment support replacement beam (3), its Design of length is between 600mm ~ 1500mm, its cross section is 300 × 500mm/300mm, and arrangement of reinforcement is with former negative two layers of Vierendeel girder (2) arrangement of reinforcement.
3. the overhanging type support replacement construction method of the horizontal inner support of steel concrete according to claim 1, is characterized in that: described stiffener (5), thickness of slab 200mm, tectonic level indented bars diameter 12mm, spacing 150mm.
4. the overhanging type support replacement construction method of the horizontal inner support of steel concrete according to claim 1, is characterized in that: the void area based on the concreting area of described increasing sole plate (6) between base plate (6) and soldier pile (4).
CN201410605549.3A 2014-10-31 2014-10-31 The overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete CN104328789B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831736A (en) * 2015-04-15 2015-08-12 中国建筑第八工程局有限公司 Support changing method and support changing structure of middle wall of foundation trench
CN104878835B (en) * 2015-05-19 2017-06-20 叶长青 Strip footing increases basement structure behind house
CN104831738B (en) * 2015-05-25 2016-09-07 成都市第六建筑工程公司 A kind of anchor draws lagging pile beams of concrete inner support support replacement construction method
CN105239583B (en) * 2015-09-07 2017-03-29 中铁三局集团有限公司 Suitable for the construction method that special-shaped deep big crossover node foundation ditch annular brace is removed
CN105332380B (en) * 2015-11-16 2017-04-12 上海建工五建集团有限公司 Strut changing structure and method for underground building
CN107740420A (en) * 2017-09-15 2018-02-27 浙江申诚环境工程有限公司 Foundation ditch tears support and support replacement system and method open

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JP2001336151A (en) * 2000-05-30 2001-12-07 Sato Kogyo Co Ltd Ground excavation method using shore strut type earth retaining timbering
KR100980185B1 (en) * 2010-03-25 2010-09-03 권오민 Bracket of multi angle
CN201809774U (en) * 2010-09-16 2011-04-27 中建三局建设工程股份有限公司 Foundation ditch support replacement and inner support removal construction structure
CN103255772A (en) * 2013-05-27 2013-08-21 天津三建建筑工程有限公司 Construction method optimizing deep foundation pit changing supporting construction sequences

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2001336151A (en) * 2000-05-30 2001-12-07 Sato Kogyo Co Ltd Ground excavation method using shore strut type earth retaining timbering
KR100980185B1 (en) * 2010-03-25 2010-09-03 권오민 Bracket of multi angle
CN201809774U (en) * 2010-09-16 2011-04-27 中建三局建设工程股份有限公司 Foundation ditch support replacement and inner support removal construction structure
CN103255772A (en) * 2013-05-27 2013-08-21 天津三建建筑工程有限公司 Construction method optimizing deep foundation pit changing supporting construction sequences

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